National Enteric Disease Surveillance : Salmonella annual report, 2011
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  • Alternative Title:
    Salmonella annual repor
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    Human Surveillance Data: Laboratory-based Enteric Disease Surveillance (LEDS)

    The Laboratory-based Enteric Disease Surveillance (LEDS) system collects reports of laboratory-confirmed human Salmonella isolates from state public health laboratories. Reporting to LEDS is voluntary, and the number of states submitting reports varies somewhat from year to year although almost all states report every year. Serotypes are summarized in this annual report as reported by state laboratories; they are usually not confirmed by CDC. Occasionally, more than one isolate is reported from a single episode of infection in a person; this report includes only one isolate of a given Salmonella serotype per person within a 30-day period. In this report, we summarize the number of infections reported and also report incidence rates (cases per 100,000 population), which are calculated as the number of Salmonella infections in humans reported for a given year divided by the state population for that year.

    Data were received from all 51 reporting jurisdictions (50 states plus the District of Columbia) in 2011. For maps (Figures 2a to 2h), data was excluded from states where: the number of laboratory-confirmed human Salmonella isolates reported to LEDS was less than 20% of the number of salmonellosis cases reported to the National Notifiable Diseases Surveillance System (NNDSS): 7 reporting jurisdictions were excluded: Florida, Kansas, Louisiana, Mississippi, New Hampshire, Nevada, Tennessee; the number of fully serotyped laboratory-confirmed human Salmonella isolates reported to LEDS was less than 20% of Salmonella isolates reported to LEDS: 7 reporting jurisdictions were excluded: Kentucky, Maine, Montana, Nebraska, Texas, Vermont, Wyoming.

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